std::atomic_flag_clear, std::atomic_flag_clear_explicit

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Defined in header `<atomic>`

void atomic_flag_clear( volatile std::atomic_flag* p );	(1)	(since C++11)

void atomic_flag_clear( std::atomic_flag* p );	(2)	(since C++11)

void atomic_flag_clear_explicit( volatile std::atomic_flag* p, std::memory_order order )	(3)	(since C++11)

void atomic_flag_clear_explicit( std::atomic_flag* p, std::memory_order order )	(4)	(since C++11)

Atomically changes the state of a std::atomic_flag pointed to by p to clear (false).

First version
void atomic_flag_clear(volatile std::atomic_flag* p) { p->clear(); }
Second version
void atomic_flag_clear(std::atomic_flag* p) { p->clear(); }
Third version
void atomic_flag_clear_explicit(volatile std::atomic_flag* p, std::memory_order order) { p->clear(order); }
Fourth version
void atomic_flag_clear_explicit(std::atomic_flag* p, std::memory_order order) { p->clear(order); }


atomic_flag (C++11)	the lock-free boolean atomic type (class)

atomic_flag_test_and_set atomic_flag_test_and_set_explicit (C++11) (C++11)	atomically sets the flag to true and returns its previous value (function)

memory_order (C++11)	defines memory ordering constraints for the given atomic operation (typedef)

Contents

p	-	pointer to std::atomic_flag to access
order	-	the memory sycnhronization ordering for this operation: only std::memory_order_relaxed, std::memory_order_consume, std::memory_order_acquire, or std::memory_order_seq_cst are permitted.